1911
Early Hertzsprung-Russell Diagram
Develops an early form of the diagram later bearing his name.
Historical place archive
Browse historical events and people recorded at Potsdam in Denmark. The records below are rendered directly from the World History Database into this page's initial HTML.
Develops an early form of the diagram later bearing his name.
Plots stellar colour against absolute brightness to reveal systematic sequences.
Provenance
These entries are generated from stored World History Database records whose country and place fields match Denmark and Potsdam. Names, dates, event labels and descriptions are reviewed and normalised as the database develops. Historical place names may not match modern administrative boundaries.
This database is a research index. For formal scholarly citation, verify individual claims against appropriate primary, archival, academic or specialist sources.